Improvement in rolls for welding and finishing tubing



M. BLAKEY. ROLLS FOR WELDING AND FINISHING TUBING.

No. 182,795. Patented om 3,1876.

'MT T -Tans- MiLDnnn BLAKEY, or nrnnfnonouen, rnimsxnvnfnm, ASSIGNOR. ToHIMSELEGEQRGE A.,GH ALFANT, AND JOHN nhoennrsomorsnrrn PLAGEL. l

IMPROVEMENT rN- oLLs' EOR WELDINGyAND FINISHING VTUBING.

. Specification forming part of Letters Patent No. 182,795, datedOctober 3,191- 61; application filed i August 24, 1876. i

To all whom it may conoernr r Be it known that 1,. MILDRED BLAKEY, ofEtna Borough, county of Allegheny, State of Pennsylvania, have invented.or discovered a new and useful Improvement in Pipe-Rolls and I do herebydeclare the following to be a full, clear, concise, and exactdescription thereof, reference being had to the accompanying drawing,making a part of this specification, in which-like letters indicatinglike parts-- Figure 1 is a side elevation of inyimproved machine,illustrating more particularly the motions and relative speeds of tl1erolls. Fig. 2 is a front or feed end elevation. Fig. 3 is a top or planview. Fig. 4 is a sectional view through a m, Fig. 3 and Fig. 5 is asectional View through y y of Fig. 3.

The rolls referred to in connection with the present invention areparticularly designed for effecting or perfecting the weld of buttweldedpipe; and since in this operation the pipe or folded skelp must be veryhot, it becomes important to provide some artificial means for keepingthe rolls from becoming unduly heated. This is one object of my presentinvention. Another is to close up, or fill up, or give a more perfectfinish to the joint along the line of weld. This I do by giving to aroll which acts on the joint a motion faster or slower than the feed, ora motion the reverse of the feed, so that such roll shall operate on thejoint by a rubbing or grinding action. I have found, by practical use,that such action on the hot exterior lips of the joint tends to bringthe lips together; or, in other words, to fill up the slight groovewhich would otherwise exist between them, and give to the pipe a moreperfect finish and appear ance.

The machine is mounted in any suitable housing, A. An enteringfeed-guide is shown at G, with an opening, 9, suitable for the feedingtherein of the folded skelp or pipe with the joint uppermost. Two pairsof grooved rolls are employed, B B and D D, both pairs being horizontal,and being arranged in the same line of feed, with a U-shaped guide, gfrom One pair to the other, and a delivery-guide, 9

on the delivery end of the machine. The grooves win the first'pair ofrolls are made in the form. each of a.semi-ellipse-that is, nar rowerat: the roll-periphery than double the depth,but with circular or ovalbottoms-the object of which form is'to give the sides of the pipea'firmlateral support while the joint is being welded by the vertical"action of the rolls. The grooves in D D are semicircular, or nearly so.The rolls B B D D are cast hollow, as shown at 0, but not with thehollow extending entirely through.

To supply cold water to the interior of these rolls in a constant flow,and thereby prevent them from becoming unduly heated, I carry into eachroll-chamber c a water-pipe, c, of a little less diameter, and supportit in any convenient way, so that the water flowing therefrom will comein contact with the roll, and keep it comparatively cool. This pipecextends to, or nearly to the closed end of the chamber 0, as shown inthe drawing. The excess of water, becoming heated, will flow out at theopen end of the chamber 0 around the pipe 0 inserted therein. By thisconstruction and arrangement I keep the water off the gearwheels, whereits presence is highly objectionable. As represented in the drawing, thegear-wheels b b d of three of the rolls, B B D, are of a uniform size,and as geared to operate with a uniform speed. The third gearwheel at ofthe roll D, while being of the same size, is operated by a connectionwith a larger wheel, W, which runs at such speed that the roll D will beoperated a little faster than the other rolls, as a result of which itwill operate with a rubbing or grinding, as well as a com pressing,action on the joint of the pipe which is passing through. I have found,by practical experience, that this rubbing or grinding on the exteriorlips of the joint tends to close such lips together, or to fill up theslight groove or score which would otherwise be left therein, andthereby produce a better finished and more perfect job. The same usefulresults will be secured, though perhaps less perfectly, by making thewheel w smaller than the wheel d, so that the roll D shall revolveslower than the feed, or by the proper change of the gearin g, the rollD may have a reverse motion, fast or slow, as may be preferred.

I do not limit myself as regards the rapidity or direction, ofrevolution of the roll D, provided only that, if revolving in thedirection of the feed, it shall move faster or slower than the feed. Anysystem of gearing suitable for driving such rolls, may be substituted'for that shown. Nor is it necessary that the rolls be horizontal, noreven parallel, as they may be vertical, or one pair angularly arrangedas regards the other. Also, the grooves may be formed of roll-sections,and one of these sections may have the speed or motion indicated withreference to the roll D, so'as to perform the same function insubstantially the same manner. With the roll D operating as shown in thedrawing, the guide 9 will prevent or counteract the tendency of the pipeto bend downward and collar on the roll D.

I am aware that itis not new to make metal rolls hollow, with awater-chamber extending entirely through them but the escape or leakageof water at the geared ends of the rolls and onto the gearingis highlyobjectionable; and this evil is one which in my improvement I haveovercome by introducing the water at, and escaping it from, the ungearedend'of the rolls, the water-chamber extending only through the workingpart of the roll.

I claim herein as my invcntion' 1. In rolls for working hot metals, awaterchamber, 0, extending from the ungeared end of the roll, throughthe working part of the roll, and terminating in a closed end, incombination with a water-supply pipe of less exterior diameter than thechamber, arranged in such chamber, and extending to, or nearly to, theclosed end of the chamber, substaniially as and for the purposes setforth.

2. The combination of grooved pipe-rolls B B D D, connected by a guide,and arranged and geared to cooperate in finishing metallic pipe, whenone of the rolls, D, which is intended to operate on the joint of thepipe, is geared to operate at a different speed from other rolls,substantially as set forth.

In testimony whereof I have hereunto set my hand.

Witnesses:

HARRY J. SoHLU'rz, GEORGE H. OJIRISTY.

MILDRED BLAKEY.

